Typewriting machine



Feb. 15 1927.

J. W. DAVIS .TYPEWRITING MACHINE Filed Aug. 20;. 1925 lllll .n

Patented Feb. 15, 1927.

fective or ineffective position. .positit-'ely hold the clamps in their locked ime JOHN W. DAVIS, or WASHINGTON, DISTRICT OF. COLUMBIA, assronon'ro UN ER-Q. WOOD TYPEWRITER COMPANY, or new YORK, N. Y., A CORPORATION. OF DELA- WARE.

rynnwnrrins MACHINE.

Application filed August 20, 1925. Serial No. 51,320.

This invention relatesto a card holding attachment for the platen of a typewriting machine. More particularly it relates to means whereby the device may be'easily attached to and removed from the machine, so as to permit the handling o other work hesides the typing upon cards. 5

According to this invention, the cardholding device is slipped into place, anchby means of suitable clamps, the same is positively locked against the axle oi the platen.

'Tl'ie platen is then positioned so that the gripping elements on the device are substantially at the top of the platen, and the upper edge of the card is inserted therein,

whereupon the platen is rotated forwardly mounted upon studs fast to the forked ears,

andywhen urged by pressure exerted upon finger-pieces forming an integral part thereof, the clamps are swung to either their ef- In order to position, there is provided a detent-pin or projection which may be attached or-struck:

out in the metal, thus forming an obstruction for-the finger-pieces, thereby preventing the accidental releaseot the clamps.

Other features and advantages will here inafter appear. In the accompanying drawings, 1 Figure l is a front view of the platen of a typewriting machine having the card-holch ing device applied thereto.

Figure 2 is an end view in elevation of'the platen of the typewriting machine, and shows the card wrapped therearound and helld thereon by means of co-operating teedrol s.

Figure 3 is a similar. view, showing the clamping means for the card-holding device in its released position. v

Figure 4 is a perspective view, showing the card-holding device removed from the machine.

The card-holding device is illustrated in Figure 4 removed from the platen of the machine, and comprises a cross-piece 1O bent to conform with the curvature of the platen and extending the full width thereof. Said cross-piece terminates at the ends thereof with 'downwardly-extending ears .11 into which there are cut elongated slots 12 straddling flat portions 13 of a platen-axle 14. V

The device itself is in turn designed tostraddie a olaten 15 as shown'inFi ure 1 in.

which position it is held closelybearingupon V the periphery of the platen by means of clamping'members 16.

'The clamping members 16 are pi'votally.

mounted at 17 011 the downwardly extending ears 11 and are normally held by friction against the ears in a position as shown in Figures 3 and 4, thus leaving aclear opening for'the platenaxle. In order, to lock the clamping membersit is only necessary to swing them rearwardly to a position as shown in Figure 2, wherein they are heldby means of a round-headed or suitably shaped pin or projection 18,. which may be struck out of the metal. tively high ratio of leverage between the binding portion 19 of. the clamping mombers 16 and the finger-pieces 20, which extend-at the other end ofthe fulcrumpoint,

it will be apparent that aslight friction of thefinger-piecesagainst the pin118 will be suiiicient to positively hold the lockingmembers in their effective positions, andthat a comparatively small-pressure on thefinger- Owing to the compara pieces will be requiredto clear the'pin when it isdesiredto release the clamping members preparatory to removing the device from the 1 machine. I According to the .method of handling the work in this device, a cardf21 is inserted,

leading edge first, under card-holding teeth 22 in the cross-piece 10, and ishent down- .wardly, as shown in Figure 1. "Theplaten' is thenrotated rearwardly, or in line-space 7 7 direction, so as towrap. the card-around the platen, as shown in Figure 2, in which posiQ tion it is held by means of'co-operating feedrolls 23,:to be typed upon by means of typing instrumentalities, represented by aity pehar24.' i I 1 It will be'noted that in orderito permit the rotation of the platen, the. finger-pieces of the locking, members '16 are designedbes low the cylindrical. contour of the platen, so that the latch Will not strike the rear table or chute, not shown, but usually found in the Underwood and other machines.

The clamping member is in the term of an elbow lever having a short armor binding portion 19, which catches under the collar or axle 14 and thereby cramps the cardthe pro ection 18, the lever may he a j-ectionl i in some cases,;as will be understood by sprunga trifle to. one sine to clear the p lVhile the card-holder is shown provided at both ends with the clamping levers, still one 01 said levers may be omitted. those skilled in the art.

Variations may he resorted to Within the scope of the invention, and portions ot the improvements may be used Without others. Having thus described my invention,

claim: i

1 A card-holder tor'use on the cylindrical platen of a.- typewriting machine, including a metal strip extending the full Width of the platen and havinga row of teeth punched "up at intervals, said teeth being slightly set outto receive the leadingedge of a card,

said metal strip tern'iinating with down Wardly-eXt-ending forked ears designed to straddle the hubs of the platen,-and means for locking the'card-holder upon the platen,

said means including locking members actuating; under the platen axle to force the metal strip against the periphery of the platen, and means for operatingand for re siliently locking the locking members.

2. A card-holder designed to hold the leading edge of a card Wrapped around the platen ofatypewriting machine having cooperatingteed rolls, including a metal strip terminatin With forked ears straddling the -pla.ten axle, means for lockingthe card;

holder upon the periphery'ot theplaten, and means for locking Stud locking means.

3. A card holder deslgned to hold the leading edge of acard Wrapped around the platen of a typewriting machine having eooperatl-ng feed r-011s,"including a metal strip terminating with forked ears straddlingthe platen axle, means for locking: the card-holder upon the periphery of the platen, said means including latches pivotally mounted upon the forked ear-s, each latch being pro yided with finger-pieces forming an'inte gral' part thereof, and means including interposing elements "cooperating with said finger-pieces to hold the latches in their lockedpositions. p

4. A card-holder designed to hold the leading edge of a card around the platen of a typewriting machine having underlying teed-rolls, means for positively securing the card-holder upon the platen, said means including two locking members rockabl-y in ant-ed upon ears forming an integral part of the card-holder and straddling the platen, said locking; members being resiliently held in their locked positions by means of interfering elements forming an integral part of said ears. I

A card-holder designed to hold the leading edge oi a card around the platen-of a typewriting machine having underlying teed-rolls, said card-holder including a crosspiece bearing upon the periphery of the laten and having gripping elements for, re ceivingthe leading edgeot the card,.and torked end pieces forming; an integral part of said cross-piece, and means for positively holding said forked end pieces to-theaxle of the platen, said means including; a latch at each end. of: the platen rockably mounted upon said forked pieces, means including; linger-pieces for operating'said latches, and means for locking; said latches in their eliectire or elosed'positions. V

A card-holder designed to hold the leading edge of a card around the platenot a typewriting machinebhaving underlying iced-rolls, said card-holder including a. cross piece bearing upon the periphery oi the platen and having gripping elements'for receiving the leading' edge ofthe card, and forked end pieces forming an integral: part of saidcross-piece, and means for positively holding said forked end pieces to the axle of the platen, said means including alatch at each end of the platen rockably mounted upon said forked pieces, means including finger-pieces tor operating said latchesyand means for locking); said latches in their effective or closed. positions, said last-mentionet means including protruding; elements in said forked pieces in the path of the linger-pieces of said latches.

- JOHN wnavrs. 

